Add documentation for AnyLoadingIndicator

LeadKit/LeadKit/Structures/Views/AnyLoadingIndicator.swift

@@ -22,16 +22,21 @@
 
 import UIKit
 
+/// Type that performs some kind of type erasure for LoadingIndicator.
 public struct AnyLoadingIndicator: Animatable {
 
     private let internalView: UIView
     private let animatableView: Animatable
 
+    /// Initializer with indicator that should be wrapped.
+    ///
+    /// - Parameter _: indicator for wrapping.
     public init<Indicator>(_ base: Indicator) where Indicator: LoadingIndicator {
         self.internalView = base.view
         self.animatableView = base.view
     }
 
+    /// The indicator view.
     var view: UIView {
         return internalView
     }